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lightning-sunbird  0.9+nobinonly
nsTextHelper.cpp
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either of the GNU General Public License Version 2 or later (the "GPL"),
00026  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
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00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 #include "nsTextHelper.h"
00039 #include "nsToolkit.h"
00040 #include "nsColor.h"
00041 #include "nsGUIEvent.h"
00042 #include "nsString.h"
00043 #include "nsStringUtil.h"
00044 #include <windows.h>
00045 
00046 
00047 NS_METHOD nsTextHelper::PreCreateWidget(nsWidgetInitData *aInitData)
00048 {
00049   if (nsnull != aInitData) {
00050     nsTextWidgetInitData* data = (nsTextWidgetInitData *) aInitData;
00051     mIsPassword = data->mIsPassword;
00052     mIsReadOnly = data->mIsReadOnly;
00053   }
00054   return NS_OK;
00055 }
00056 
00057 NS_METHOD nsTextHelper::SetMaxTextLength(PRUint32 aChars)
00058 {
00059   ::SendMessage(mWnd, EM_SETLIMITTEXT, (WPARAM) (INT)aChars, 0);
00060   return NS_OK;
00061 }
00062 
00063 NS_METHOD  nsTextHelper::GetText(nsString& aTextBuffer, PRUint32 aBufferSize, PRUint32& aActualSize) {
00064 
00065   int length = GetWindowTextLength(mWnd);
00066   int bufLength = length + 1;
00067   NS_ALLOC_CHAR_BUF(buf, 512, bufLength);
00068   int charsCopied = GetWindowText(mWnd, buf, bufLength);
00069   aTextBuffer.SetLength(0);
00070   aTextBuffer.AppendWithConversion(buf);
00071   NS_FREE_CHAR_BUF(buf);
00072   aActualSize = charsCopied;
00073   return NS_OK;
00074 }
00075 
00076 NS_METHOD  nsTextHelper::SetText(const nsString &aText, PRUint32& aActualSize)
00077 { 
00078   mText = aText;
00079 
00080   SetWindowText(mWnd, NS_LossyConvertUCS2toASCII(aText).get());
00081   aActualSize = aText.Length();
00082   return NS_OK;
00083 }
00084 
00085 NS_METHOD  nsTextHelper::InsertText(const nsString &aText, PRUint32 aStartPos, PRUint32 aEndPos, PRUint32& aActualSize)
00086 { 
00087   nsString currentText;
00088 
00089   PRUint32 actualSize;
00090   GetText(currentText, 256, actualSize);
00091   nsString newText(aText);
00092   currentText.Insert(newText.get(), aStartPos, aText.Length());
00093   SetText(currentText,actualSize);
00094   aActualSize = aText.Length();
00095 
00096   mText = currentText;
00097 
00098   return NS_OK;
00099 }
00100 NS_METHOD  nsTextHelper::RemoveText()
00101 {
00102   SetWindowText(mWnd, "");
00103   return NS_OK;
00104 }
00105 NS_METHOD  nsTextHelper::SetPassword(PRBool aIsPassword)
00106 {
00107   mIsPassword = aIsPassword;
00108   return NS_OK;
00109 }
00110 NS_METHOD nsTextHelper::SetReadOnly(PRBool aReadOnlyFlag, PRBool& aOldFlag)
00111 {
00112   aOldFlag = mIsReadOnly;
00113   mIsReadOnly = aReadOnlyFlag;
00114   // Update the widget
00115   ::SendMessage(mWnd, EM_SETREADONLY, (WPARAM) (BOOL)aReadOnlyFlag, (LPARAM)0);
00116   return NS_OK;
00117 }
00118   
00119 NS_METHOD nsTextHelper::SelectAll()
00120 {
00121   ::SendMessage(mWnd, EM_SETSEL, (WPARAM) 0, (LPARAM)-1);
00122   return NS_OK;
00123 }
00124 
00125 NS_METHOD  nsTextHelper::SetSelection(PRUint32 aStartSel, PRUint32 aEndSel)
00126 {
00127   ::SendMessage(mWnd, EM_SETSEL, (WPARAM) (INT)aStartSel, (INT) (LPDWORD)aEndSel); 
00128   return NS_OK;
00129 }
00130 
00131 
00132 NS_METHOD  nsTextHelper::GetSelection(PRUint32 *aStartSel, PRUint32 *aEndSel)
00133 {
00134   ::SendMessage(mWnd, EM_GETSEL, (WPARAM) (LPDWORD)aStartSel, (LPARAM) (LPDWORD)aEndSel); 
00135   return NS_OK;
00136 }
00137 
00138 NS_METHOD  nsTextHelper::SetCaretPosition(PRUint32 aPosition)
00139 {
00140   SetSelection(aPosition, aPosition);
00141   return NS_OK;
00142 }
00143 
00144 NS_METHOD  nsTextHelper::GetCaretPosition(PRUint32& aPos)
00145 {
00146   PRUint32 start;
00147   PRUint32 end;
00148   GetSelection(&start, &end);
00149   if (start == end) {
00150     aPos = start;
00151   }
00152   else {
00153     aPos =  PRUint32(-1);/* XXX is this right??? scary cast! */
00154   }
00155   return NS_OK;
00156 }
00157 
00158 //-------------------------------------------------------------------------
00159 //
00160 // nsTextHelper constructor
00161 //
00162 //-------------------------------------------------------------------------
00163 
00164 nsTextHelper::nsTextHelper() : nsWindow(), nsITextWidget()
00165 {
00166   mIsReadOnly = PR_FALSE;
00167   mIsPassword = PR_FALSE;
00168 }
00169 
00170 //-------------------------------------------------------------------------
00171 //
00172 // nsTextHelper destructor
00173 //
00174 //-------------------------------------------------------------------------
00175 nsTextHelper::~nsTextHelper()
00176 {
00177 }
00178 
00179 //-------------------------------------------------------------------------
00180 //
00181 // return the window class name and initialize the class if needed
00182 //
00183 //-------------------------------------------------------------------------
00184 LPCWSTR nsTextHelper::WindowClassW()
00185 {
00186     return(L"EDIT");
00187 }
00188 
00189 //-------------------------------------------------------------------------
00190 //
00191 // return the window class name and initialize the class if needed
00192 //
00193 //-------------------------------------------------------------------------
00194 LPCTSTR nsTextHelper::WindowClass()
00195 {
00196     return("EDIT");
00197 }
00198 
00199 //-------------------------------------------------------------------------
00200 //
00201 // return window styles
00202 //
00203 //-------------------------------------------------------------------------
00204 DWORD nsTextHelper::WindowStyle()
00205 {
00206     DWORD style = ES_AUTOHSCROLL | WS_BORDER | WS_CHILD | WS_CLIPSIBLINGS | ES_NOHIDESEL;
00207     if (mIsPassword)
00208       style = style | ES_PASSWORD;
00209 
00210     if (mIsReadOnly)
00211       style = style | ES_READONLY;
00212   
00213     return style; 
00214 }
00215 
00216 //-------------------------------------------------------------------------
00217 //
00218 // return window extended styles
00219 //
00220 //-------------------------------------------------------------------------
00221 
00222 DWORD nsTextHelper::WindowExStyle()
00223 {
00224     return 0;
00225 }
00226 
00227 //-------------------------------------------------------------------------
00228 //
00229 // Clear window before paint
00230 //
00231 //-------------------------------------------------------------------------
00232 
00233 PRBool nsTextHelper::AutoErase()
00234 {
00235   return(PR_TRUE);
00236 }
00237 
00238